Tavon White, who has been serving 20 years of jail at Baltimore City Detention Center, managed to rake in tens of thousands of dollars a week by smuggling drugs and mobile phones, CBS Baltimore reports.

Tavon White, also called as 'Bulldog', considered the jail as his own fiefdom as he managed to operate a drugs smuggling racket and other illegal businesses from the confines of jail.

He reportedly had long-term sexual liaisons with several prison guards and a report last year claimed that he impregnated four prison guards, one of whom had allegedly had two children by White, raising his total number of possible prison babies to five.

Two out of those four females had Tavon's name tattooed on their bodies, reports said.

The prosecutors claimed that female corrections officers smuggled BGF members contraband such as cellphones, and drugs that allowed the gangsters to manage illegal businesses from the confines of jail.

“White allegedly had long-term sexual relationships inside BCDC with four correctional officers — Jennifer Owens, Katera Stevenson, Chania Brooks, and Tiffany Linder — impregnating each of the four officers at least once,” the FBI said in a release.

“Owens had ‘Tavon’ tattooed on her neck and Stevenson had ‘Tavon’ tattooed on her wrist.

Prosecutor Robert Harding said corrupt guards allowed the state-run jail to become the undisputed turf of the Black Guerilla Family, a gang led locally by Tayvon "Bulldog" White.

However White, a member of the Black Guerilla Family who is also known as "The Bulldog", is now set to become a star witness in the prosecution of two other inmates and five prison guards over money laundering, drugs and conspiracy charges.

White has already pleaded guilty to a number of drug distribution and money laundering charges.

Authorities have tried for years to dismantle the BGF. The gang formed in San Francisco in the 1960s and by 2008 had a monopoly over the drug trade inside the Baltimore jail. A federal probe in 2009 also led to indictments of many BGF members and associates, including four prison guards.

The BGF is considered primarily a prison gang, though its operations have branched out onto the streets of major cities across America. It is organized in units or "bubbles," and each unit has a commander and others who perform specific duties. The Black Guerilla Family also has its own manual, "The Black Book," sold to inmates at a discounted price, according to court documents.